The Darvas Box Breakout Indicator for NinjaTrader 8

In 1956 Nicolas Darvas was a 35-year-old ballroom dancer touring the world. He didn’t have a Bloomberg terminal, a screener, a chat room, or electronic trading charts. He had cabled stock quotes sent to his hotels in Tokyo, Saigon, and Hong Kong, and a few notebooks. By 1958 he had turned about $36,000 into more than $2 million — and his 1960 book How I Made $2,000,000 in the Stock Market became one of the most influential retail-trading books ever written.

The system he came up with — what he called Box Theory — is what this indicator implements for NinjaTrader 8. Stocks moved in “boxes,” he said. A high price would print, then 3 days later if it still hadn’t been exceeded, that high was the top of the box. After that, a low would print and 3 days later if it still hadn’t been broken — that was the bottom. Now you had a rectangle. Darvas placed a buy stop just above the top and a protective stop just below the bottom. When the breakout fired, he was in. When the next box formed above, he added. When the bottom of the current box broke, he was out. Simple, mechanical, and ruthless about losers.

🧠 How the Darvas Box Forms

Our indicator implements Darvas’s two-stage detection exactly as the book describes it:

1. Top locks. A new highest high prints. We then count consecutive bars without a higher high. Once that count hits Confirmation Days (Darvas canonical = 3), the top is locked.
2. Bottom locks. Once the top is locked, we look for the lowest low since that top. We count consecutive bars without a lower low. Once that count hits Confirmation Days, the bottom is locked.
3. Box is armed. With both sides confirmed, the box is now a fixed rectangle (gold by default) and we’re watching for breakout in either direction.
4. Breakout fires. If price breaks above the top, the box is recorded as broken-up (green) and a long signal fires. If price breaks below the bottom, the box is recorded as broken-down (red) and a short signal fires. Either way, a fresh box-search starts immediately at the breakout bar — that’s the “stacked boxes” pattern Darvas described.

If price makes a new higher high while the bottom is still being searched for, the entire process resets — that high becomes the new top candidate. The box wasn’t valid yet, so there’s nothing to retire.

📊 Reading the Chart

Boxes are color-coded by state, and that’s the fastest way to read what the indicator is showing you:

• Gold rectangle — currently armed, watching for breakout.
• Green rectangle with a triangle below — broken upward, long signal fired on that bar.
• Red rectangle with a triangle above — broken downward, short signal fired on that bar.
• Yellow horizontal line through every box — the 50% midline, a frequent intra-box reference level. Optional.
• Dashed horizontal lines at the current armed box’s top and bottom — these track in real time as a new box forms.

The screenshot below shows a textbook stacked-box uptrend on NQ: four green broken-up boxes climbing the chart, each one’s breakout becoming the launching point for the next, with the current armed box (gold, on the right) waiting for its own breakout decision.

🔄 Up Trends, Down Trends, and Regime Changes

Darvas himself was strictly long-only — he traded stocks in bull markets and used a downside break of his current box as the stop-out signal, not as a short trigger. This indicator gives you both directions. The book purist can disable Show Short Breakdowns, but on futures the symmetric short signals tend to be useful: a stack of red boxes telegraphs a sustained downtrend just as cleanly as the upside version, and the regime change between them is something you can see rather than infer.

📈 Combining With a Trend Filter

One of the cleanest uses of the indicator is as the signal half of a two-step setup: Darvas tells you when the box breaks, a separate indicator tells you whether the regime supports taking the trade. The chart screenshots above include an RSI panel for exactly that reason — it’s a quick visual filter for which side of the breakout to favor.

A simple version of that filter in code: take long breakouts only when RSI is above 50, take short breakdowns only when RSI is below 50. The indicator’s public Series outputs make this wiring trivial.

private RSI							rsi;
private PatternsDarvasBoxBreakout	darvas;

protected override void OnStateChange()
{
    if (State == State.SetDefaults)
    {
        Name		= "DarvasRsiTrendFilter";
        Calculate	= Calculate.OnBarClose;
    }
    else if (State == State.DataLoaded)
    {
        rsi    = RSI(14, 3);
        darvas = PatternsDarvasBoxBreakout(
            showLong:                  true,
            showShort:                 true,
            confirmationDays:          3,
            breakoutBasis:             PatternsDarvasBoxBreakout_BreakoutBasis.Close,
            requireVolumeConfirmation: true,
            volumeAvgPeriod:           20,
            volumeMultiplier:          1.5);
    }
}

protected override void OnBarUpdate()
{
    if (CurrentBar < 50) return;

    // Long breakout above the box top, only if RSI confirms uptrend
    if (darvas.IsLongBreakoutSeries[0] && rsi[0] > 50)
        EnterLong("Darvas Long");

    // Short breakdown below the box bottom, only if RSI confirms downtrend
    if (darvas.IsShortBreakdownSeries[0] && rsi[0] < 50)
        EnterShort("Darvas Short");
}

private RSI							rsi;
private PatternsDarvasBoxBreakout	darvas;

protected override void OnStateChange()
{
    if (State == State.SetDefaults)
    {
        Name		= "DarvasRsiTrendFilter";
        Calculate	= Calculate.OnBarClose;
    }
    else if (State == State.DataLoaded)
    {
        rsi    = RSI(14, 3);
        darvas = PatternsDarvasBoxBreakout(
            showLong:                  true,
            showShort:                 true,
            confirmationDays:          3,
            breakoutBasis:             PatternsDarvasBoxBreakout_BreakoutBasis.Close,
            requireVolumeConfirmation: true,
            volumeAvgPeriod:           20,
            volumeMultiplier:          1.5);
    }
}

protected override void OnBarUpdate()
{
    if (CurrentBar < 50) return;

    // Long breakout above the box top, only if RSI confirms uptrend
    if (darvas.IsLongBreakoutSeries[0] && rsi[0] > 50)
        EnterLong("Darvas Long");

    // Short breakdown below the box bottom, only if RSI confirms downtrend
    if (darvas.IsShortBreakdownSeries[0] && rsi[0] < 50)
        EnterShort("Darvas Short");
}

The same wiring works with any trend gauge — ADX, a 200-MA slope, the Squeeze, your own custom regime indicator. Every signal-relevant value is exposed as a Series<T> so historical lookback (e.g. darvas.BoxTopSeries[5]) works.

Public Outputs

🛡️ Volume Confirmation

Darvas put a lot of weight on volume on the breakout day. A box top that broke on light volume was, in his words, “suspicious” — he often saw price retreat right back into the range. The indicator implements this as an optional gate: when Require Volume Confirmation is on, a breakout bar only fires its long/short signal if its volume meets or exceeds Volume Multiplier times the prior Volume Average Period-bar average.

With volume confirmation engaged, the chart cleans up significantly — only signal-confirmed boxes render by default. Volume-rejected breakouts are filtered out of the visual signal stream:

If you want to see where price tried to break out without volume — useful for backtest analysis and for understanding what the filter rejected — toggle Show Muted Breakout Boxes on. The volume-rejected boxes render with the same color coding as confirmed ones, but no signal triangle/label appears on them:

⚙️ Settings

Settings are organized into five groups: Box Breakout, Box Definition, Breakout, Display, and Display Colors. The defaults match Darvas-canonical behavior wherever the book is specific (3-day confirmation, primary long signal); modern defaults are picked elsewhere (Close-basis breakout, volume gate off, both directions enabled).

Box Breakout

Box Definition

Breakout

Display

Display Colors

📝 When It Works, When It Doesn’t

Darvas’s system was built for trending markets. He picked stocks that were already moving, and he expected the next box to print above the current one. In strong trends, the indicator does exactly what you’d hope: a clean stack of broken boxes climbing the chart, with the current armed box telegraphing where the next breakout will fire.

In choppy, range-bound markets the picture is messier. Boxes form, break, and re-form repeatedly without follow-through, and you’ll get a string of failed breakouts in both directions. That’s where the volume gate and a regime filter (RSI, ADX, MA-slope, your-favorite-trend-thing) earn their keep — they’re the difference between trading every breakout and trading the breakouts that have a chance.

📦 Download

To install:

1. Download the .zip file using the button above.
2. In NinjaTrader 8, go to Tools → Import → NinjaScript Add-On.
3. Select the downloaded .zip file.
4. The indicator appears under Indicators → indMyDailyTake → Patterns – Darvas Box Breakout on your chart.

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This indicator implements Box Theory as described in Nicolas Darvas’s 1960 book How I Made $2,000,000 in the Stock Market. The implementation is by MyDailyTake.com and adds modern conveniences (configurable confirmation count, optional short signals, volume filter, customizable rendering) on top of the canonical algorithm. Use at your own risk; trading the same setups Darvas traded does not guarantee Darvas-like outcomes.